Inflatable container

Abstract

An inflatable container is provided, the container including a sealed flexible membrane having an interior, a first end and a second end, and a rigid elongate member extending into the interior of the membrane and attached to the membrane at a first attachment point at the first end of the membrane and at a second attachment point at the second end of the membrane. The container finds use, for example, in floating dry dock assemblies. A first aspect of the invention provides an inflatable container comprising a sealed flexible membrane having an interior, a first end and a second end, and a rigid elongate member extending into the interior of the membrane and attached to the membrane at a first attachment point at the first end of the membrane and at a second attachment point at the second end of the membrane.

Description

Technical Field

[0001] The present invention relates to an inflatable container. The inflatable container finds use, for example, in floating assemblies such as floating deck assemblies. The floating assembly according to the present invention can be employed as a dry floating dock. The inflatable container according to the present invention finds alternative use as a water bag.

Background Art

[0002] GB 783407 A (Patent Document 1) and US 2795257 A (Patent Document 2) disclose foldable containers for liquid according to the prior art.

[0003] WO 99 / 27330 A1 (Patent Document 3) discloses a device for producing a load in the form of a liquid-filled container according to the prior art, which uses suspension means for suspending the container from the load.

[0004] Floating deck assemblies are known and have previously been used in a wide range of applications. For example, air bladders supporting decks have been used for many years to bridge rivers and marshes, or as pontoons for mooring boats.

[0005] More recently, floating deck assemblies have found use as dry floating docks.

[0006] GB 2570453 A (Patent Document 4) discloses a floating deck assembly according to the prior art. The deck assembly comprises a first support assembly, a deck, a plurality of support members extending between and connecting the first support assembly and the deck, and a plurality of inflatable containers disposed between the first support assembly and the deck.

[0007] The assembly disclosed in GB2570453 A may also be used as a floating-dry dock, comprising the steps of lifting a container or other floating structure out of the water and returning the container to the water. When in use, the inflatable containers are inflated to a certain level to allow the deck assembly to be lowered below the container in the water. In particular, if the assembly is floating, one of the inflatable containers is partially or completely deflated by the amount required to lower the assembly so that the deck is at the appropriate depth below the water surface. The assembly is then maneuvered directly below the container or structure to be lifted, or the container or structure is maneuvered across the deck of the deck assembly. The inflatable containers are then inflated, lifting the deck assembly until the outer shell of the containers makes contact with the deck. Continuously inflating the inflatable containers lifts the container out of the water. The reverse procedure is followed to return the container to the water.

[0008] Suitable inflatable containers are known and commercially available in the art. Suitable inflatable containers include inflatable bags. One preferred inflatable container is the cylindrical Seaflex® inflatable bag class, available from Unique Group.

[0009] Prior art inflatable bags typically include a flexible membrane of a material with flexible internal connecting rings extending between attachment points within the membrane at opposite ends of the bag. When the bag is inflated, the internal connecting rings provide tensile force between the attachment points, preventing the container from expanding under internal pressure. Thus, the internal connecting rings help maintain the container's shape when inflated.

[0010] Prior art inflatable bags can be connected to structures that are submerged or partially submerged in water. This connection is made via a shackle located on the outer surface of the flexible membrane at one of the attachment points, which is positioned at the bottom of the bag when in use.

[0011] The internal connecting cable is oriented approximately vertically during use. The buoyancy of the inflatable bag is transmitted via tension within the internal connecting cable to a shackle located at the bottom of the bag, providing an upward force to the submerged or partially submerged structure to which the shackle is connected.

[0012] However, this presents a specific challenge when prior art inflatable bags are used to provide buoyancy to a floating deck assembly where a portion of the structure, including the deck, is designed to protrude above the water surface. In particular, they cannot be connected above the deck because, when inflated, they would be unable to provide the buoyancy required to raise the deck above the water surface. This necessitates the inclusion of an additional support assembly connected to the deck via multiple support members extending between the support assembly and the deck, so that the inflatable bags can be connected to it while remaining entirely or partially submerged, even when the deck is protruding above the water surface. Each inflatable bag is connected to the support assembly via a shackle positioned between the support assembly and the deck, and located at the bottom of the bag when in use. The buoyant lifting force of each inflated bag is transmitted to the support assembly via the shackle as tension in an internal connecting ring rope. The support assembly, in turn, transmits the buoyant lifting force to the deck via the multiple support members. The support assembly of the floating deck assembly according to prior art must therefore be sufficiently robust to withstand the buoyant lifting force of each inflatable bag, as well as the weight of the deck and support members.

[0013] To achieve the required strength and rigidity, the support assemblies used in prior art floating deck assemblies have a heavy and deep draft. Reducing the weight and draft of floating deck assemblies, such as those described in GB2570453 A, is advantageous as it allows them to operate in shallower waters and be adapted to larger and / or heavier vessels.

[0014] Therefore, there is a need for improved inflatable bags for use in floating assemblies such as floating deck assemblies. [Prior art documents] [Patent Documents]

[0015] [Patent Document 1] British Patent Application Advertisement No. 783407 Specification [Patent Document 2] U.S. Patent No. 2795257 [Patent Document 3] International Publication No. 99 / 27330 [Patent Document 4] UK Patent Application Publication No. 2570453 [Overview of the project] [Means for solving the problem]

[0016] Therefore, the first aspect of the present invention is, A sealed flexible membrane having an interior, a first end, and a second end, A rigid extension member extending inside the membrane, attached to the membrane at a first attachment point at the first end of the membrane, and attached to the membrane at a second attachment point at the second end of the membrane, An expandable container is provided, equipped with the following features.

[0017] The inflatable container of the present invention comprises a sealed flexible membrane. The membrane has an interior within it. The sealed flexible membrane is sealed on all sides, defining a substantially airtight and / or watertight interior.

[0018] The flexible membrane may be formed from any suitable material. Suitable materials are known and commercially available in the art. The membrane should be formed from a material that is strong enough to withstand the pressure difference that arises between the inside and outside of the membrane when the container is in use. Suitable materials include, but are not limited to, polymer materials, such as polyester. The material is preferably coated with, for example, polyvinyl chloride or polyurethane. One example of a suitable material is a High Tensile Trevira Polyester base fabric coated with a durable UV-stabilized PVC or polyurethane coating.

[0019] The material may be porous. More preferably, the material is non-porous.

[0020] During use, the interior of the flexible membrane is filled with a fluid to inflate the container. The fluid may be a gas, a mixture of gases, a liquid, a mixture of liquids, or a mixture of one or more gases and one or more liquids. In a preferred embodiment, the fluid is air. In an alternative embodiment, the fluid is water.

[0021] When the container is inflated, the sealed flexible membrane can take on any preferred shape. For example, when inflated, the membrane may be spherical, oval, cubic, or irregular in shape. When inflated, the container may have a constant cross-sectional area along the length from the first end to the second end. This has the advantage that the container can be arranged to provide a constant waterline area when it is partially submerged and rises or falls relative to the water surface. Alternatively, the cross-sectional area of ​​the container may vary along the length from the first end to the second end. For example, when inflated, the container may be tapered along part or all of the length from the first end to the second end.

[0022] In a preferred embodiment, the membrane assumes a substantially cylindrical shape when inflated. The ends of the cylinder may be substantially flat or rounded when the container is inflated to its operating pressure. Where the membrane assumes a substantially cylindrical shape when inflated, the first and second attachment points are preferably located at the respective first and second ends of the cylindrical membrane.

[0023] When the container is inflated, the sealed flexible membrane defines an internal volume. The maximum internal volume of the flexible membrane when fully inflated will depend on the shape and dimensions of the membrane. The maximum internal volume of the container may vary in accordance with the intended use or function of the container. For example, in the case of a container intended for use in water to provide buoyancy, the internal volume will be determined by the amount of water that will be displaced by the container, and therefore the buoyancy that will be provided.

[0024] Generally, the maximum internal volume of the flexible membrane is 1 m3 to 250 m3, preferably 5 m3 to 100 m3, more preferably 10 m3 to 25 m3.

[0025] The material of the flexible membrane may have any suitable thickness. For example, the thickness of the membrane may be selected based on the material used to form the membrane, the dimensions of the inflatable container, and the volume of fluid that it must contain when in use. Alternatively or additionally, the thickness of the membrane may be selected based on the maximum pressure it must withstand when inflated.

[0026] The thickness of the flexible membrane may be uniform across the entire outer surface of the container. Alternatively, the thickness of the flexible membrane may be non-uniform. In particular, the membrane may be thicker at points of stress, for example to provide reinforcement to resist splitting or tearing. For example, the membrane may be thicker at the first and second attachment points. Where the membrane assumes a shape having corners and / or edges such as a cube when inflated, the membrane may be thicker at the corners and / or edges. The membrane may also be thicker in regions of the outer surface that may be subject to abrasion or wear.

[0027] Thicker thicknesses can be achieved, for example, by laminating one or more layers of the material forming the flexible film.

[0028] The container of the present invention further comprises an extension member. The extension member is rigid and extends between a first end and a second end of the container. The rigid extension member plays a structural role when the container is inflated.

[0029] In particular, the rigid extension member provides a restraining force between the first and second attachment points, restraining the relative movement of the first and second ends of the inflatable container. This restraining force may be a tensile or compressive force.

[0030] For example, a rigid extension member prevents the first and second ends of an inflatable container from bending outward or expanding due to internal pressure when the container is inflated. In doing so, the rigid extension member is placed under tension.

[0031] The rigid extension member also, by being rigid, provides resistance to compressive forces, particularly forces acting from one of the first or second ends toward the other of the first and second ends, thereby preventing the container from deforming under the action of external forces applied at or near the first and second attachment points. In doing so, the rigid extension member is placed in a compressed state.

[0032] The rigid extension member may be formed from any suitable material. The material of the rigid extension member is preferably selected to withstand the maximum tensile and compressive forces that may be subjected to by the rigid extension member during use. Suitable materials for forming the rigid extension member include metals, metal alloys, polymers, or composite materials. In a preferred embodiment, the rigid extension member is formed from a metal, and steel is one preferred material.

[0033] The rigid extension member may have any preferred cross-sectional shape, such as circular or polygonal. In one preferred embodiment, the rigid extension member is circular in cross-section. Preferably, the rigid extension member has a uniform cross-sectional area along its length.

[0034] The rigid extension member may be solid, however, preferably at least a portion of the rigid extension member is hollow. In a particularly preferred embodiment, the rigid extension member comprises a tube.

[0035] The rigid extension member may be of any suitable length. The length of the rigid extension member is generally determined by the length of the container from the first end to the second end. Typically, the rigid extension member is 0.5m to 15m in length, preferably 1m to 10m, and more preferably 2m to 3m.

[0036] The rigid extension member is attached at its ends to the membrane at the attachment points of the first and second ends of the membrane. The rigid extension member may be attached to the flexible membrane at the first and second attachment points by any suitable attachment means. In one preferred embodiment, the rigid extension member may be attached to the flexible membrane at the first and second attachment points by one or more attachment members such as plates, collars, or flanges. In particular, the rigid extension member may have plates, collars, or flanges at one or both ends.

[0037] In one embodiment, the rigid extension member may be attached to the membrane at a first attachment point by a first attachment member located at or adjacent to the first end of the rigid extension member. The first attachment member may be detachably connected to the rigid extension member. More preferably, the first attachment member is permanently connected to the rigid extension member or formed integrally with the extension rigid member by joining it to the rigid extension member, for example by welding.

[0038] A first attachment member is used to connect a rigid extension member to a membrane at a first attachment point on the first end. The membrane may be attached to the first attachment member of the rigid extension member by any suitable means. This attachment means is suitable for preventing the rigid extension member from being detached from the membrane under normal operating pressure of the container. Suitable attachment means include joining, such as using a suitable adhesive, screw connections such as studs or bolts, and riveting.

[0039] The membrane may be reinforced with a reinforcing material in the region of the first attachment point. The reinforcing material may include regions of increased membrane thickness.

[0040] In one preferred embodiment, the reinforcing material comprises a first reinforcing member positioned inside or outside the membrane. In one preferred embodiment, the first reinforcing member is positioned outside the membrane. The first reinforcing member may be in the form of a reinforcing plate or a reinforcing ring. In one preferred embodiment, the first reinforcing member is a reinforcing ring.

[0041] The first reinforcing member may be formed from any suitable material. The first reinforcing member may be formed from the same material as the rigid extension member, or from a different material. Suitable materials include metals, metal alloys, polymers, or composite materials. In a preferred embodiment, the first reinforcing member is formed from steel.

[0042] The flexible membrane material in the region of the first attachment point is preferably positioned between portions of a rigid member, for example, between the first attachment member and a reinforcing member. In particular, the first reinforcing member is fixed to the first attachment member, thereby sandwiching the flexible membrane material at the first attachment point between the reinforcing member and the first attachment member, and attaching the first end of the rigid extension member to the membrane.

[0043] The first reinforcing member may be attached to the membrane and / or the first attachment member by any preferred means. The material of the flexible membrane may have a plurality of holes at the first attachment point to receive a plurality of fasteners used to secure the first reinforcing member to the first attachment member. Preferred fasteners include, but are not limited to, threaded members such as studs or bolts, and rivets.

[0044] The rigid extension member may be attached to the membrane at the second attachment point by a second attachment member located at or adjacent to the second end of the rigid extension member, in a manner similar to that described above.

[0045] As discussed above, the first and / or second mounting member may comprise a plate, collar, or flange.

[0046] Similarly, the membrane may be reinforced by reinforcement in the region of the second attachment point. The reinforcement may include regions of increased membrane thickness.

[0047] In one preferred embodiment, the reinforcing member comprises a second reinforcing member positioned on the inside or outside of the membrane for attachment to the membrane at a second attachment point, in a manner similar to the first reinforcing member described above. The second reinforcing member may be in the form of a reinforcing plate or a reinforcing ring. In one preferred embodiment, the second reinforcing member is a reinforcing ring.

[0048] The rigid extension member may be completely housed within the flexible membrane. Alternatively, one or more portions of the rigid extension member may extend through and outward through the flexible membrane. In some preferred embodiments, the end portions of the rigid extension member extend through the flexible membrane at a first attachment point and / or a second attachment point.

[0049] For example, in one embodiment, the first end of the rigid extension member may extend through the first attachment member, the material of the flexible membrane at the first attachment point, and the first reinforcing member.

[0050] Similarly, the second end of the rigid extension member may extend through the second attachment member, the flexible membrane material at the second attachment point, and the second reinforcing member.

[0051] Providing a container with a rigid, elongated member extending within a flexible membrane has significant advantages when the inflatable container according to the present invention is used to provide buoyancy to an external object or structure.

[0052] In particular, the rigid extension member contained within the inflatable container according to the present invention is typically oriented substantially vertically during use. When the container sinks whole or partially, the rigid extension member can transmit the force generated as a result of the buoyancy of the inflatable container to one or both of the first and second attachment points at the first and second ends of the membrane.

[0053] Specifically, for example, when the first attachment point is located at the top of the container and the rigid extension member is oriented substantially vertically, the buoyancy of the inflatable container is transmitted to the first attachment point via the rigid extension member during use. Therefore, as the buoyancy of the container is pressed against the weight of the object or structure connected to the first attachment point, the rigid extension member is subjected to a compressive force.

[0054] Similarly, when the rigid extension member is oriented substantially vertically, for example, with the second attachment point located at the bottom of the container, the buoyancy of the inflatable container is transmitted to the second attachment point via the rigid extension member during use. Therefore, as the buoyancy of the container is pulled against the weight of the object or structure connected to the second attachment point, the rigid extension member is subjected to tensile force.

[0055] Therefore, the inclusion of a rigid extension member within the inflatable container according to the present invention enables the inflatable container to transmit buoyancy-lifting forces to an external structure via one or both of the first and second attachment points. This is particularly beneficial because it enables the inflatable container to be connected to an external structure in various configurations not possible with prior art inflatable bags.

[0056] For example, an inflatable container can be connected to an external structure at one of a first or second attachment point located at the top of the container during use, and can provide buoyant lifting force to a structure located approximately above the container. Alternatively, an inflatable container can be connected to an external structure at one of a first or second attachment point located at the bottom of the container during use, and can provide buoyant lifting force to a structure located approximately below the container.

[0057] The inflatable vessel may be connected to an external structure at both the first and second attachment points. This has the additional advantage of transmitting the vessel's buoyancy simultaneously through both attachment points, and thus reduces the magnitude of the buoyant lifting force transmitted through each of the first and second attachment points. This, in turn, reduces the risk of flexible membrane failure at or near the attachment points.

[0058] The inflatable container according to the present invention may be connected to an object or structure at either end of the membrane, and this connection is made directly or indirectly to the individual ends of the rigid extension members. In one embodiment, the inflatable container includes one or more connectors located at one or both of the first and second attachment points for connecting the inflatable container to an external structure. One or more connectors may include any suitable components for permanently or detachably connecting the container to an object or structure. One or more connectors may include a connector flange for connection to an object or structure.

[0059] In one embodiment, the rigid extension member extends through a first attachment point and membrane at its first end, as described above, and the connector flange is located on a portion of the first end of the rigid extension member, extending beyond the first attachment point, outside the membrane. The connector flange may be used to secure the inflatable container to an object or structure using, for example, a releasable fastener such as a bolt, or a permanent fastener such as a rivet inserted through a hole in the connector flange.

[0060] In one embodiment, the connector comprises an open connector tube. The connector tube may be provided by an end portion of a rigid extension member extending outward from the membrane. Alternatively, the connector tube may be connected directly or indirectly to the rigid extension member, for example, via one or more flanges. When in use, the open end portion of the connector tube may engage with a corresponding plug provided on an object or structure, which serves to position the container relative to the object or structure and allows the connector tube to be connected to the plug, for example, by one or more bolts, pins, or equivalent.

[0061] The connector may be equipped with a cushioning material to accommodate small relative movements between the inflatable container and the object or structure when connected. The cushioning material may be formed from an elastic material such as natural or synthetic rubber or other elastic polymers. The cushioning material may have any preferred form. For example, the cushioning material may be an O-ring.

[0062] The container may have one or more connectors at only one end. Alternatively, the container may have one or more connectors at each end.

[0063] In a preferred embodiment, the connector includes one or more mooring devices for connecting to the stretched wire.

[0064] The inflatable container according to the present invention preferably comprises a fluid port. The fluid port may be used to inflate or deflate the container by pressurizing fluid into or out of the flexible membrane through the fluid port. For example, the fluid port may be connected to a compressor and / or pump via a manifold to supply fluid into or remove fluid from the inside of the membrane during use.

[0065] The fluid port may be located within the flexible membrane. However, in a preferred embodiment, the rigid extension member further comprises a fluid port, and the rigid extension member comprises a fluid conduit for fluid to pass between the fluid port and the interior of the membrane. In one embodiment, at least a portion of the rigid extension member is hollow, and the hollow portion provides a conduit for fluid flow. In one preferred embodiment, the rigid extension member comprises a tube, which provides a conduit for fluid flow and has one or more openings therein to allow fluid to flow into or out of the interior of the membrane. One or both of the first and second ends of the rigid extension member may comprise a fluid port.

[0066] An inflatable vessel preferably includes a pressure relief system to allow excess fluid pressure within the vessel to be released. Excess fluid pressure within the vessel can be caused by over-expansion, changes in ambient temperature, or a decrease in hydrostatic pressure as the vessel rises through the water column. Preferably, the pressure relief system includes a pressure relief valve, such as a blow-off valve. Suitable valves are known in the art and are commercially available.

[0067] The pressure relief valve may be provided within a flexible membrane. However, in a preferred embodiment, the pressure relief valve is provided within a rigid extension member. For example, the pressure relief valve may be located within the first and / or second ends of the rigid extension member. In this arrangement, the rigid extension member comprises a conduit for drawing fluid from the inside of the membrane to the pressure relief valve. This conduit may be the same conduit discussed above for supplying fluid into or removing fluid from the inside of the container. Alternatively, the rigid extension member may comprise a separate pressure relief conduit.

[0068] The inclusion of fluid ports and / or pressure relief valves within rigid extension members reduces or eliminates the need to position such components within a flexible membrane, as in the prior art inflatable bags. This reduces the complexity of the flexible membrane. This not only simplifies the process of manufacturing the flexible membrane but also reduces the likelihood of leakage forming at structural weak points created by the insertion of fluid ports and / or pressure relief valves through the membrane.

[0069] The rigid extension member may further comprise one or more drainage pipes for releasing fluid from the rigid extension member beyond the first and / or second attachment points and membrane. In particular, one or more drainage pipes may be located at the bottom of the inflatable container when in use. The fluid can therefore be released from the rigid extension member through one or more drainage pipes from the bottom of the inflatable container. The released fluid can be used to remove sediment from the sea, river, or lake bottom directly below the inflatable container. This can increase the water depth below the inflatable container and increase the depth to which the inflatable container can sink.

[0070] The inflatable container according to the present invention finds specific applications in floating assemblies such as floating deck assemblies.

[0071] Therefore, a further aspect of the present invention is to provide a floating assembly comprising at least one inflatable container as described earlier herein.

[0072] In a further aspect, the present invention provides a floating assembly, which is, The first frame assembly, The second frame assembly, A plurality of support members extend between the first frame assembly and the second frame assembly, connecting them, A plurality of inflatable containers, according to the first aspect of the present invention, are positioned between a first frame assembly and a second frame assembly. It is equipped with.

[0073] Generally, the first frame assembly is positioned above the multiple inflatable containers during use, while the second frame assembly is positioned below the multiple inflatable containers during use.

[0074] Each inflatable container may be connected to the first frame assembly at a first attachment point for transmitting the buoyancy of the inflatable container to the first frame assembly, and / or connected to the second frame assembly at a second attachment point for transmitting the buoyancy of the inflatable container to the second frame assembly.

[0075] Preferably, each inflatable container is connected to both the first and second frame assemblies, so that during use, the buoyancy of each container is transmitted to the first frame assembly by compression within the rigid extension member and to the second frame assembly by tension within the rigid extension member.

[0076] This is advantageous because the buoyancy of the multiple inflatable vessels spreads across both the first and second frame assemblies, thus reducing the load requirements on any one of the first or second frame assemblies.

[0077] The floating assembly according to the present invention may be employed in a floating deck assembly, the floating deck assembly further comprising one or more deck panels that form a deck connected to a first frame assembly.

[0078] The ability to directly transmit all or part of the buoyancy of each inflatable vessel to a first frame assembly located above the inflatable vessel during use reduces or eliminates the need to include a support assembly below the inflatable vessel, which is capable of withstanding the force arising from the combined buoyancy of each inflatable vessel, as well as the weight of the deck and support members, as in prior art floating deck assemblies. Therefore, the total weight and draft of the floating deck assembly can be reduced by employing the inflatable vessel according to the present invention. This is particularly advantageous when the floating deck assembly according to the present invention is employed as a floating dry dock.

[0079] In a further aspect, the present invention provides a floating-dock comprising a floating deck assembly as described earlier herein.

[0080] When used as a floating dock, one or more of the inflatable containers may be deflated entirely or partially to a certain level in order to allow the deck assembly to be lowered below the vessel or structure in the water. In particular, one or more of the containers are preferably deflated only by the amount required to lower the floating deck assembly to an appropriate depth below the water surface. The assembly is then maneuvered directly below the vessel or structure to be raised, or the vessel or structure is maneuvered across the deck of the deck assembly. The inflatable containers are then inflated, raising the floating deck assembly until the outer shell of the containers makes contact with the deck. Continuously inflating the inflatable containers raises the containers out of the water. The reverse procedure is followed to return the containers to the water.

[0081] Therefore, a further aspect of the present invention is to provide a method for lifting a container or structure out of water, and this method is The steps include providing a floating-dry dock as described earlier in this specification, The steps include: sinking a floating dock below the container or structure to be lifted, Steps include maneuvering a floating dock below the container or structure to be lifted, A floating dock, and a step of lifting the container or structure to be lifted, Includes.

[0082] This method further involves the following steps, namely: The steps include deflating one or more of the inflatable containers in order to sink the floating dock below the container or structure to be lifted, The steps include inflating one or more inflatable containers in order to lift a floating dock and a container or structure to be lifted, It may include.

[0083] The reduced draft of a floating deck assembly employing an inflatable vessel according to the present invention allows it to be submerged to greater depths to accommodate larger vessels, or to be used in shallower waters than prior art assemblies.

[0084] In addition, the reduced weight of a floating deck assembly employing an inflatable container according to the present invention allows for the lifting of heavier containers when compared to prior art assemblies employing inflatable bags with the same total buoyancy.

[0085] In a particularly preferred embodiment, the buoyancy-boosting force of each inflatable container is fully transmitted by the compressive force within the rigid extension member to the assembly and / or deck, which are positioned above the inflatable container during use.

[0086] In such embodiments, it may still be preferable to stabilize the inflatable containers by connecting a second attachment point, located at the bottom of each inflatable container during use, to a portion of the assembly below the inflatable container. However, this connection preferably does not transmit any substantial upward force to the assembly. This connection may be provided, for example, by one or more tensioned wires.

[0087] The inflatable vessel of the present invention allows the floating deck to be provided using very few or minimal structural components. In a more preferred aspect of the present invention, the first and second frame assemblies, as well as the multiple support members of the floating assembly described above, may be omitted entirely.

[0088] Therefore, in a further aspect, the present invention is an expansionable container as described earlier herein, A deck panel connected to the first attachment point of the inflatable container, A floating deck unit is provided, equipped with the following features.

[0089] Two or more floating deck units according to the present invention can be connected together in a modular arrangement to form a floating deck assembly.

[0090] Therefore, a further aspect of the present invention is to provide a floating deck assembly comprising two or more floating deck units.

[0091] Floating deck assemblies may be used within floating dry docks.

[0092] In one embodiment of the modular arrangement, the first attachment point of each inflatable vessel is connected to an individual deck panel, and the second attachment point of each inflatable vessel is connected to the second attachment point of one or more adjacent inflatable vessels, forming a floating deck assembly. The tie ropes may be rigid or flexible.

[0093] The inflatable container according to the present invention finds applications in floating deck assemblies, while also offering significant advantages in alternative applications.

[0094] In one embodiment, the inflatable container according to the present invention can be used as a container for fluids, including liquids. In one application, the container finds use as a water bag. Water bags are commonly used in the construction and engineering industries to perform load testing on bridges, walkways, pontoons, and other load-bearing structures. This was previously achieved using large, flexible bags without structural reinforcement. These bags, therefore, sag under the weight of the water they contain, thereby occupying a relatively large surface area relative to their height. Furthermore, water bags according to the prior art must be manufactured using a thick, heavy membrane material capable of holding large amounts of water in an unsupported, undivided state.

[0095] The inflatable containers according to the present invention can be used as improved water bags for performing load tests on structures. In particular, when the inflatable containers according to the present invention are filled with water or other liquids, they are subjected to gravity-induced internal pressure that is approximately equivalent to the internal pressure due to buoyancy when used in water.

[0096] However, the inflatable container according to the present invention does not sag like a water bag of the prior art, but maintains its structure due to the compressive strength of the rigid extension member. Therefore, the surface area occupied by the inflatable container is small compared to its height. This allows heavier weights of water to be loaded per unit area, thereby increasing the test load capacity.

[0097] The inclusion of a rigid, stretchable membrane allows for the use of a thinner and lighter flexible membrane material compared to prior art water bags. In particular, the rigid, stretchable member provides additional structural support when the inflatable container is filled with liquid, thereby reducing the load-bearing requirements of the flexible membrane compared to prior art water bags.

[0098] Therefore, a further aspect of the present invention is to provide a method for performing load tests on structures, and this method is The steps include placing an inflatable container, as described earlier in this specification, on the structure to be tested, The steps include: inflating the expandable container using a liquid, Includes. The present invention provides, for example, the following items: (Item 1) An expandable container, A sealed flexible membrane having an interior, a first end, and a second end, A rigid extension member extending into the interior of the film, attached to the film at a first attachment point at the first end of the film, and attached to the film at a second attachment point at the second end of the film. An expandable container equipped with the following features. (Item 2) The expandable container according to item 1, wherein the rigid expandable member is attached to the membrane at a first attachment point by a first attachment member located at or adjacent to the first end of the rigid expandable member. (Item 3) The inflatable container according to item 1 or item 2, wherein the rigid extension member is attached to the membrane at a second attachment point by a second attachment member located at or adjacent to the second end of the rigid extension member. (Item 4) The first attachment member and / or the second attachment member comprises a plate, collar, or flange, as described in item 2 or item 3 of the inflatable container. (Item 5) The inflatable container according to any of the above items, wherein the membrane is reinforced by a reinforcing material in the region of the first attachment point and / or the second attachment point. (Item 6) The inflatable container according to item 5, wherein one or both of the reinforcing materials are reinforcing members disposed on the inside or outside of the membrane. (Item 7) The inflatable container according to item 6, wherein one or both of the reinforcing members are provided with reinforcing rings. (Item 8) One or more of the rigid extension members extends through the membrane and outward therefrom, the expandable container according to any of the above items. (Item 9) The end of the rigid extension member extends through the membrane at the first attachment point and / or the second attachment point, the inflatable container according to item 8. (Item 10) The inflatable container according to any of the preceding items, further comprising one or more connectors located at one or both of the first and second attachment points for connecting the inflatable container to an external structure. (Item 11) An expandable container according to any of the above items, wherein at least a portion of the rigid extension member is hollow. (Item 12) The rigid extension member is an expandable container according to any of the above items, comprising a tube. (Item 13) The expandable vessel according to the item, wherein the rigid expandable member further comprises a fluid port, and the rigid expandable member comprises a fluid conduit for a fluid to pass between the fluid port and the interior of the flexible membrane. (Item 14) An expandable container according to any of the above items, further comprising a pressure relief valve provided within the rigid extension member. (Item 15) The inflatable container according to any of the above items, further comprising one or more drain pipes for discharging fluid from the rigid extension member beyond the first and / or second attachment points. (Item 16) A floating assembly comprising at least one inflatable container as described in any of the preceding items. (Item 17) A floating assembly, wherein the assembly is The first frame assembly, The second frame assembly, A plurality of support members extending between the first frame assembly and the second frame assembly and connecting them, A plurality of inflatable containers as described in any of items 1-15, positioned between the first frame assembly and the second frame assembly, A floating assembly equipped with [the necessary components]. (Item 18) The flotation assembly according to item 17, wherein each inflatable container is connected to the first frame assembly at a first attachment point for transmitting the buoyancy of the inflatable container to the first frame assembly, and / or connected to the second frame assembly at a second attachment point for transmitting the buoyancy of the inflatable container to the second frame assembly. (Item 19) It is a floating deck assembly, A floating assembly as described in either item 17 or 18, One or more deck panels forming a deck connected to the first frame assembly A floating deck assembly equipped with [a specific feature]. (Item 20) It is a floating deck unit, An inflatable container as described in any of items 1-15, A deck panel connected to the first attachment point of the inflatable container and A floating deck unit equipped with [a specific feature]. (Item 21) A floating deck assembly comprising two or more floating deck units as described in item 20. (Item 22) A floating dry dock comprising a floating deck assembly as described in either item 19 or item 21. (Item 23) A method for lifting a container or structure out of water, wherein the method is The step of providing a floating / drying dock as described in item 22, The steps include: sinking the floating dock below the container or structure to be lifted; The steps include: operating the floating dock below the container or structure to be lifted; The floating dock and the steps of lifting the container or structure to be lifted Methods that include... (Item 24) Below the container or structure to be lifted, in order to submerge the floating dock, The steps include deflating one or more of the aforementioned inflatable containers, The steps include inflating one or more of the inflatable containers in order to lift the floating dock and the container or structure to be lifted, The method described in item 23, further including the method described in item 23. (Item 25) A method for conducting load tests on structures, wherein the method is The steps include placing the inflatable container described in any of items 1-15 on the structure to be tested, The steps include: inflating the inflatable container using a liquid; Methods that include... [Brief explanation of the drawing]

[0099] Embodiments of the present invention will be described here only as examples, with reference to the accompanying drawings.

[0100] [Figure 1] Figure 1 is a cross-sectional view of a prior art inflatable bag.

[0101] [Figure 2] Figure 2 is a perspective view of an inflatable container according to one embodiment of the present invention, as viewed from above and from one side.

[0102] [Figure 3] Figure 3 is a perspective view of the inflatable container shown in Figure 2, viewed from below and one side.

[0103] [Figure 4] Figure 4 is an exploded view of the components of the container shown in Figure 2 in its disassembled state.

[0104] [Figure 5] Figure 5 is an enlarged perspective view of the first attachment point of the container in Figure 2.

[0105] [Figure 6] Figure 6 is an enlarged perspective view of a portion of the first end of the rigid extension member of the container shown in Figure 2.

[0106] [Figure 7] Figure 7 is an enlarged perspective view of a portion of the second end of the inflatable container shown in Figure 2.

[0107] [Figure 8] Figure 8 is a perspective view of a floating deck assembly including multiple inflatable containers according to the present invention.

[0108] [Figure 9] Figure 9 is a magnified view of the connection section of the floating deck assembly shown in Figure 8.

[0109] [Figure 10] Figure 10 is a perspective view of a floating deck unit according to one embodiment of the present invention.

[0110] [Figure 11] Figure 11 is a perspective view of a further embodiment of the floating deck assembly of the present invention.

[0111] [Figure 12] Figure 12 is a perspective view of the floating / drying dock assembly of the present invention.

[0112] [Figure 13] Figure 13 is a perspective view of multiple inflatable containers according to the present invention, positioned on a bridge. [Modes for carrying out the invention]

[0113] Figure 1 is a cross-sectional view of a prior art inflatable bag, generally shown in 10. The inflatable bag includes a flexible membrane 20. The flexible membrane is sealed to define the interior 22 and the exterior 24.

[0114] A flexible internal connecting loop extends into the flexible membrane 20 at the opposite end of the inflatable bag, between a first attachment point 26 and a second attachment point 28 within the membrane 20. The flexible internal connecting loop 30 is subjected to a tensile force T between the first and second attachment points 26 and 28 when the container is inflated. The tension in the connecting loop between the first and second attachment points prevents the container from expanding under internal pressure when inflated.

[0115] A first shackle 32 is connected to a flexible internal connecting ring rope 30 at a first attachment point 26. A second shackle 34 is connected to the flexible internal connecting ring rope 30 at a second attachment point 28. Shackles 32 and 34 can be used to connect the inflatable bag to a subsided or partially subsided external structure.

[0116] The flexible internal connecting ring 30 is oriented approximately vertically when in use. When the inflatable bag 10 sinks, the tension in the flexible internal connecting ring 30 transmits the force generated as a result of the buoyancy B of the inflatable container to the second shackle 34 at the second attachment point 28 located at the bottom of the container. The buoyancy B of the inflatable bag can therefore be used to pull and lift the sinking external structure connected to the second shackle 34 when in use.

[0117] Turning to Figure 2, we see a top and side perspective view of an inflatable container according to one embodiment of the present invention, generally indicated as 110. Container 110 is shown in a bottom and side perspective view in Figure 3. The components of container 110 are shown in Figure 4.

[0118] The inflatable container 110 includes a flexible membrane 120. The flexible membrane is sealed to define the interior 122 and the exterior 124.

[0119] The rigid extension member 130 extends into the flexible membrane 120. The rigid extension member extends between the first attachment point 126 and the second attachment point 128 at the individual first and second ends of the membrane.

[0120] The rigid extension member 130 is a hollow, substantially cylindrical tube. The rigid extension member 130 is made of steel. However, a wide range of alternative materials may be used, depending on the size of the inflatable container 110 and the magnitude of the force it must withstand.

[0121] The rigid extension member receives a tensile force T between the first and second attachment points 126 and 128 when the container 110 is inflated. The tension in the rigid extension member between the first and second attachment points provides a restraining force to prevent the container from expanding under internal pressure when inflated.

[0122] The rigid extension member can also receive compressive forces C applied at or near the first and second attachment points 126, 128. The resistance to compression within the rigid extension member therefore provides a restraining force that allows the inflatable container to withstand compression during use. This prevents the container from deforming when subjected to external forces.

[0123] The rigid extension member 130 is oriented approximately vertically during use. When the inflatable container 110 sinks, the tension within the rigid extension member 130 transmits the buoyancy B of the inflatable container to the second attachment point 128 located at the bottom of the container during use. The buoyancy B of the inflatable container can therefore be used to pull and lift a sinking external structure connected to the second attachment point 128 during use.

[0124] Furthermore, as the inflatable container 110 sinks, the compressive resistance force within the rigid extension member 130 transmits the buoyancy B of the inflatable container to the first attachment point 126 located at the top of the container during use. The buoyancy B of the inflatable container can therefore be used to push up and raise the sinking external structure connected to the first attachment point 128 during use.

[0125] Please refer to Figures 4 and 5. The rigid extension member 130 includes a first attachment member comprising a first flange 132 located at the first end portion of the rigid extension member for attachment to the membrane 120 at the first attachment point 126. The first flange 132 is spaced apart from the end of the rigid member 130. The first flange is fixed to the rigid extension member by welding.

[0126] The container comprises a first reinforcing ring 134 for attachment to a first flange 132 at a first attachment point 126 of the membrane using a plurality of fasteners such as bolts (not shown). When the inflatable container 110 is fully assembled, as shown in Figures 2 and 3, the material of the flexible membrane 120 at the first attachment point 126 is located between the first flange 132 and the first reinforcing ring 134. In particular, the first reinforcing ring 134 is fixed to the first flange 132, thereby sandwiching the middle portion of the flexible membrane 120 between the first reinforcing ring and the first flange, forming a water seal. As can be seen in Figure 4, the flexible membrane 120 includes a first plurality of holes 140 for receiving a plurality of fasteners used to attach the first reinforcing ring 134 to the first flange 132.

[0127] When the inflatable container is fully assembled, as shown in Figure 2, a portion of the rigid extension member 130 extends through the opening 142 in the membrane at the first attachment point 126, as can be seen in more detail in Figure 5. In particular, the rigid extension member extends through the first flange 132, the flexible membrane 120, and the first reinforcing ring 134 to protrude beyond the outer surface of the membrane.

[0128] Optional shackles 154 are connected to the ends of the rigid extension members 130, as shown in Figure 5. These shackles can be used to connect the inflatable container to an external structure or to a lifting device such as a crane to assist in maneuvering the inflatable container.

[0129] Referring again to Figure 4, the rigid extension member 130 includes a second attachment member 128, which has a second flange 136 located at the second end of the rigid extension member for attachment to the membrane 120 at the second attachment point. The second flange is fixed to the end of the rigid extension member by welding. The container includes a second reinforcing ring 138 for attachment to the second flange 136 at the second attachment point 128 using a number of fasteners such as bolts (not shown). When the inflatable container is fully assembled, as shown in Figures 2 and 3, a portion of the material of the flexible membrane 120 at the second attachment point 128 is located between the second flange 136 and the second reinforcing ring 138. In particular, the second reinforcing ring 138 is fixed to the second flange 134, thereby sandwiching a portion of the flexible membrane 120 between the second reinforcing ring and the second flange, forming a water seal. As shown in Figure 4, the flexible membrane 120 includes a second set of holes 144 at the second attachment point to receive a set of fasteners used to attach the second reinforcing ring to the second flange.

[0130] One or more connectors, such as the shackle 164 shown in Figures 3 and 7, may be used to connect the second reinforcing ring 138 to an object or structure. In an alternative embodiment, the components at the second end of the rigid extension member are arranged in a manner similar to that shown in Figure 5, as described above with respect to the first end, and a portion of the second end of the rigid extension member may extend through and beyond the surface of the membrane 120.

[0131] Looking at Figures 5 and 6, the first fluid port 150 is located within the first partition wall 152 at the first end of the rigid extension member 130. The first fluid port 150 is shown together with a camlock connector 150a for connection to a compressor or pump manifold. The rigid extension member further comprises a second fluid port 156 opening into the interior of the membrane 120, as can be seen in Figure 6. The interior of the rigid extension member 130 forms a fluid conduit between the first fluid port 150, the second fluid port 156, and the interior of the flexible membrane, through which fluid can be discharged or extracted from the interior of the flexible membrane, inflating and deflating the inflatable container 110 as needed.

[0132] Referring to Figure 7, an enlarged perspective view of the second attachment point 128 of the inflatable container of Figure 3 as seen from outside the flexible membrane is shown. The second end of the rigid extension member is sealed by the second partition wall 162, providing fluid sealing. The pressure relief valve 160 is located within the second partition wall 162. The interior of the rigid extension member 130 forms a fluid conduit between the interior of the flexible membrane and the pressure relief valve through which excess fluid pressure can be released.

[0133] Figure 8 is a perspective view of a floating assembly, specifically a floating deck assembly 200 including a plurality of inflatable vessels 110 according to the present invention. The floating assembly includes a first frame assembly 210 and a second frame assembly 220. The first frame assembly 210 includes a plurality of first frame members 212 interconnected to form a grid defining a plurality of unit cells. The first frame assembly 210 further includes a plurality of deck panels 214. Each deck panel is located within a unit cell of the grid of frame members 212. The second frame members 220 include a plurality of second frame members 222. A plurality of support members 230 extend between the first frame assembly 210 and the second frame assembly 220 and connect them.

[0134] The multiple inflatable containers 110 according to the present invention are positioned between a first frame assembly 210 and a second frame assembly 220 when in use. Each inflatable container 110 is connected to the first frame assembly at its first attachment point 126. In particular, the first attachment point of each inflatable container is connected to an individual deck panel 214 at a connection point 240, as will be described in more detail below.

[0135] Figure 9 is an enlarged perspective view of a connection 240 within a deck panel 214. This connection includes an opening 242 within the deck panel for positioning the first reinforcing ring 134 of the container 110. Additional components located at the first end of the rigid extension member, including the first fluid port 150, are visible and accessible through the opening 242.

[0136] Multiple connecting plates 244 extend radially within the opening 242. Each connecting plate has an opening at a first attachment point for receiving one of a plurality of bolts 246 that extend through the first flange, the flexible membrane, and the first reinforcing ring. Each bolt 246 is secured with a nut 248.

[0137] The buoyancy of the inflatable container is transmitted to the deck panel 214 at the connection point 240.

[0138] Figure 10 shows a floating deck unit 300 according to a further embodiment of the present invention. The floating deck unit 300 comprises an inflatable container 110, as shown in Figure 2. The deck panel 310 is mounted on the first end of the container 110 in a manner similar to that shown in Figure 9 and described above. The deck panel 310 is a sealed box structure that maintains a small amount of buoyancy even when the inflatable container is fully deflated. This helps the unit remain upright even when the rigid extension members of the inflatable container are oriented vertically during use.

[0139] Figure 11 shows several floating deck units 300, as shown in Figure 10, connected together in a modular arrangement to form a floating deck assembly 400. The flexible membrane of each inflatable vessel is shown in a deflated state. Each deck unit 300 is connected to its adjacent assembly by connecting members 410. The connecting members may be rigid, such as rods, poles, or tubes, or flexible, such as cables.

[0140] Referring to Figure 12, a floating dock assembly, generally indicated as 500, is shown. The floating dock assembly includes a floating deck assembly 400, as shown in Figure 11, and is positioned directly beneath the ship 510.

[0141] Finally, Figure 13 shows a plurality of inflatable containers 110 according to the present invention, which are inverted and positioned on the bridge 600. The inflatable containers are filled with a liquid, such as water, to perform load testing on the bridge.

Claims

1. An expandable container, A sealed flexible membrane having an interior, a first end, and a second end, A rigid extension member extending within the interior of the film, attached to the film at a first attachment point at the first end of the film, and attached to the film at a second attachment point at the second end of the film, A pressure relief system that enables the release of excess fluid pressure in the aforementioned inflatable container, comprising a pressure relief valve The rigid extension member further comprises a fluid port, and the rigid extension member comprises a fluid conduit for the fluid to pass between the fluid port and the interior of the flexible membrane. The pressure relief system is an expandable container connected to the fluid conduit of the rigid extension member.

2. The expandable container according to claim 1, wherein the rigid expandable member is attached to the membrane at a first attachment point by a first attachment member located at or adjacent to the first end of the rigid expandable member.

3. The expandable container according to claim 1 or claim 2, wherein the rigid expandable member is attached to the membrane at a second attachment point by a second attachment member located at or adjacent to the second end of the rigid expandable member.

4. The inflatable container according to claim 2 or 3, wherein the first attachment member and / or the second attachment member comprises a plate, a collar, or a flange.

5. The inflatable container according to any one of claims 1 to 4, wherein the membrane is reinforced by a reinforcing material in the region of the first attachment point and / or the second attachment point.

6. The expandable container according to claim 5, wherein one or both of the reinforcing materials are reinforcing members disposed on the inside or outside of the membrane.

7. The expandable container according to claim 6, wherein one or both of the reinforcing members are provided with reinforcing rings.

8. The expandable container according to any one of claims 1 to 7, wherein one or more portions of the rigid extension members extend through the membrane and to the outside of the membrane.

9. The expandable container according to claim 8, wherein the end portion of the rigid extension member extends through the membrane at the first attachment point and / or the second attachment point.

10. The inflatable container according to any one of claims 1 to 9, further comprising one or more connectors located at one or both of the first and second attachment points for connecting the inflatable container to an external structure.

11. The expandable container according to any one of claims 1 to 10, wherein at least a portion of the rigid extension member is hollow.

12. The rigid extension member comprises a tube, as described in any one of claims 1 to 11, for the expandable container.

13. The expandable container according to any one of claims 1 to 12, wherein the rigid expandable member further comprises one or more drainage pipes for discharging fluid from the rigid expandable member beyond the first and / or second attachment point.

14. A floating assembly comprising at least one inflatable container according to any one of claims 1 to 13.

15. A floating assembly, wherein the assembly is The first frame assembly and The second frame assembly, A plurality of support members extending between the first frame assembly and the second frame assembly and connecting the first frame assembly and the second frame assembly, A plurality of inflatable containers according to any one of claims 1 to 13, disposed between the first frame assembly and the second frame assembly, A floating assembly equipped with [the necessary components].

16. The floating assembly according to claim 15, wherein each inflatable container is connected to the first frame assembly at a first attachment point to transmit the buoyancy of the inflatable container to the first frame assembly, and / or connected to the second frame assembly at a second attachment point to transmit the buoyancy of the inflatable container to the second frame assembly.

17. It is a floating deck assembly, A floating assembly according to any one of claims 15 and 16, One or more deck panels forming a deck connected to the first frame assembly A floating deck assembly equipped with [a specific feature].

18. It is a floating deck unit, An expansion container according to any one of claims 1 to 13, A deck panel connected to the first attachment point of the inflatable container and A floating deck unit equipped with [a specific feature].

19. A floating deck assembly comprising two or more floating deck units as described in claim 18.

20. A floating dock comprising the floating deck assembly according to claim 18 or claim 19.

21. A method for lifting a container or structure out of water, wherein the method is To provide the floating / drying dock described in claim 20, Submerging the floating dock below the container or structure to be lifted, To operate the floating dock below the container or structure to be lifted, To lift the floating dock and the container or structure to be lifted. Methods that include...

22. To lower the floating dock below the container or structure to be lifted, one or more of the inflatable containers are deflated. In order to lift the floating dock and the container or structure to be lifted, one or more of the inflatable containers are to be inflated. The method according to claim 21, further comprising:

23. A method for conducting load tests on structures, wherein the method is The expandable container according to any one of claims 1 to 13 is placed on the structure to be tested, Using a liquid to inflate the aforementioned expandable container and Methods that include...

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